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Nastasia [14]
3 years ago
6

Do it please mmm m mm mmm mm

Mathematics
1 answer:
netineya [11]3 years ago
3 0

Answer:

148 cubed feet

Step-by-step explanation:

(8*2*3)+(5*4*5) = volume

(48)+(100)

148

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What is an
Evgesh-ka [11]

Step-by-step explanation:

y = - 4

y =  - 4

6 0
3 years ago
Read 2 more answers
A) If x = a + 7 and y = b-a, show that x + y = b + 7. ​
Lesechka [4]

Step-by-step explanation:

x = a + 7

y = b-a

To prove

x + y = b + 7.

  1. x+y= (a+7) + (b-a)

=a+7+b-a

=a-a+7+b

=0 + 7+b

= b+7

Proved ✅

5 0
2 years ago
Can someone please help me with this? I dont understand how to do these at all
saw5 [17]
The functions are:

i) g(x)=3\cdot \sin(x+ \pi )

ii) f(x)=2 \cos(x).


We note that both Sin and Cos functions cannot produces values smaller than -1, or larger than 1.

In other words, the range of both these functions is [-1, 1]. 

Whatever expression A is, sin(A) and cos(A) are values in [-1, 1].


Assume \sin(x+ \pi ) produced its maximal value, 1, then 3\sin(x+ \pi ) makes this value 3.

Thus, the maximum value of g(x) is 3, as can be also seen in the graph.

Similarly, assume cos(x) produced 1, then 2cos(x) makes it 2. Thus, the greatest value of f(x) is 2.


Answer: max{f(x)}=2, max{g(x)}=3, so g has the largest maximal value.
3 0
3 years ago
A tank initially contains 50 liters of water with 15kg of salt mixed in. Salt water with concentration 1/3 kg/L runs in at the r
Nimfa-mama [501]

Answer:

13.57 kg

Step-by-step explanation:

Let the amount of salt in a tank be =\frac{salt in the tank}{volume of salt in the tank}

                                                         =    \frac{15}{50}

                                                         =  0.3 kg/L

The concentration of salt coming into the tank = 0.333kg/L

We know that the concentration of salt leaving the tank should be:

amount of salt in the tank/volume of tank = y(t)/50 L

rate of change of salt = rate in - rate out

\frac{dy}{dt} = 0.66 - \frac{y}{50}

solving the differential equation gives :

ln y = 0.66/y (t) - 0.02 t + C

Initial conditions, t= 0; y (0) = 15

then ln 15 = C

ln y = \frac{0.66}{y}t - 0.02t + ln 15

ln\frac{y}{15} = 0.02t

y = 15e( exp -0.02t)

the amount of salt in 5 mins will be:

y (t) = 15e(exp -0.02 (5)

      = 13.57 kg

4 0
3 years ago
The manager of a car dealership wants to attach a rope with flags to the top of a pole and to a stake in the ground, as shown in
nikklg [1K]

Use the Pythagorean theorem:

Let the distance = X:

X = √(26^2 + 19.5^2)

X = √(676 + 380.25)

X = √1056.25

X = 32.5

The distance is 32.5 ft.

7 0
3 years ago
Read 2 more answers
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